Synthesis of NH006—a photostable fungicide effective against Botrytis cinerea—according to the asymmetric total synthesis of MK8383
作者:Nobuyuki Hayashi、Kentaro Yamamoto、Nobuto Minowa、Masaaki Mitomi、Masahisa Nakada
DOI:10.1039/b924096a
日期:——
MK8383, isolated from Phoma sp. T2526 in 1993, exhibits potent antibiotic activities against a variety of phytopathogens and has been considered a promising fungicide against Botrytis cinerea. Unfortunately, MK8383 is a photosensitive compound and it undergoes irreversible decomposition. Although much effort has been devoted to improving the photostability of MK8383 by chemical modification of its structure by a research group organized by Meiji Seika Kaishya, Ltd. and Mitsubishi Chemical Corporation, a photostable MK8383 derivative has never been prepared. We have found that a C13-14 double bond of MK8383 and (+)-phomopsidin is responsible for the photosensitivity, and herein, we report the synthesis of NH006, an MK8383 derivative with a saturated C13-14 double bond and (S) configuration at C14, based on the asymmetric total synthesis of MK8383. NH006 exhibits good photostability and potent antifungal activity against B. cinerea.
1993年从Phoma sp. T2526中分离出的MK8383,对多种植物病原体显示出强大的抗生素活性,并被认为是一种有前景的针对灰葡萄孢菌的杀菌剂。不幸的是,MK8383是一种光敏性化合物,会发生不可逆的分解。尽管明治制果株式会社和三菱化学株式会社组织的一个研究团队投入了大量努力,通过化学改性MK8383的结构来提高其光稳定性,但从未制备出光稳定的MK8383衍生物。我们发现,MK8383和(+)-phomopsidin的C13-14双键是导致光敏感性的原因,在此,我们基于MK8383的不对称全合成,报告了NH006的合成,这是一种在C13-14位具有饱和双键和在C14位具有(S)构型的MK8383衍生物。NH006表现出良好的光稳定性和对灰葡萄孢菌的强大抗真菌活性。